CONDENSED COMBINED DEBTOR-IN-POSSESSION FINANCIAL INFORMATION - Debtors' Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	$ 406,493		$ 267,109
Accounts receivable, net of allowance	1,575,170		1,508,370
Allowance for receivables	50,808		48,450
Prepaid expenses	195,266		209,330
Other current assets	58,088		82,538
Total Current Assets	2,235,017		2,067,347
Property, plant and equipment, net	1,791,140		1,884,714
Indefinite-lived intangibles - licenses	2,417,915		2,451,813
Other intangibles, net	453,284		550,056
Goodwill	4,118,756		4,051,082	$ 4,066,575
Other assets	282,240		278,267
Segment assets	12,269,515		12,260,431	$ 12,851,789
Accounts payable	163,149		163,449
Accrued expenses	826,865		769,128
Accrued interest	3,108		268,102
Deferred income	208,195		181,551
Current portion of long-term debt	46,332		14,972,367
Total Current Liabilities	1,247,649		16,354,597
Other long-term liabilities	489,829		610,639
Liabilities subject to compromise	16,480,256		0
Total Liabilities and Equity (Deficit)	12,269,515		$ 12,260,431
Liabilities subject to compromise, intercompany note payable, principal amount outstanding		$ 1,031,700
Debtors
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	178,924
Accounts receivable, net of allowance	866,088
Allowance for receivables	26,347
Prepaid expenses	98,836
Other current assets	24,576
Total Current Assets	1,168,424
Property, plant and equipment, net	501,677
Indefinite-lived intangibles - licenses	2,409,411
Other intangibles, net	196,741
Goodwill	3,412,753
Other assets	63,203
Segment assets		7,752,209
Accounts payable	49,129
Due to Clear Channel Outdoor	2,894
Accrued expenses	296,149
Accrued interest	766
Deferred income	120,328
Current portion of long-term debt	46,105
Total Current Liabilities		$ 515,371
Other long-term liabilities	229,640
Liabilities subject to compromise	17,511,976
Equity (Deficit)	(10,504,778)
Total Liabilities and Equity (Deficit)	$ 7,752,209